| Father | Jacob de Klerk a1b6c3 (1757 - ) |
| Mother | Johanna Cornelia Tas d2 (1775 - ) |
| Sibling | Abraham Johannes de Klerk (1797 - ) |
| Sibling | Jacoba Magdalena (b6c3d8) de Klerk (1800 - ) |
| Sibling | Magdalena Johanna de Klerk (1803 - ) |
| Sibling | Maria Adriana de Klerk (1803 - ) |
| Sibling | Izak Johannes (Jacobus) de Klerk (1808 - ) |
| Sibling | Johannes Christiaan de Klerk (1809 - ) |
| Sibling | Johanna Hendrina Tas (1811 - ) |
| Sibling | Jacob Christoffel de Klerk (1812 - ) |
| Sibling | Adam Petrus de Klerk (1815 - ) |
| Sibling | Barend Jacobus de Klerk (1819 - ) |